Labels:text | diagram | screenshot OCR: LAN DIAL-OUT ROUTER SOLUTIONS Third party software NOS routing software LAN hub ISDN adapter card) ISDN File server LAN hab Router LAN adaptors Client software EIN adapters for on-line access Client software for on-line access Clients Cilents ISDN Internal Router Extomal Router Figure 1. In a file-server-based ISDN router solution (on the left) network clients access ISDN through the file server's ISDN adapter card. An external router (such as the one on the right) provides, for example, one Hithernet port and one ISDN port; clients connect to the router via the Ethernet hub.